Scroll to see break-even price per barrel for oil in 2015 for select oil producers, and click on a country's name for more details. modest oil-price recovery and currency devaluations have lowered breakeven prices for countries like Russia and Nigeria, but some petrostates still need oil prices above $100 a barrel to balance their budgets.
There are dozens of types of gemstones â including diamonds, colored gemstones, and pearls â each with a unique set of physical and optical properties. GIRDLE â The narrow band around the perimeter of a polished or faceted diamond or colored gemstone.
The Gemstone Bloodstone. Bloodstone is a dark green to dark bluish-green variety of Chalcedony that is speckled with red or brown spots. The spotting appears similar to blood stains, as is indicative of the name of this gemstone.The spots may be very sparse to almost non-existent, or they may be very dense and interwoven.he base color of Bloodstone may be solid green, but it often has an uneven color distribution, with lighter and darker green zones, or even bluish-gray or dark yellow streaks and spots. USES. Bloodstone is most often cut into cabochons and beads, where it is used in bracelets and necklaces, and sometimes rings.